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api0.app

api0.app

Free plan WebAPI
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Spec score 7.9 #10 of 36 in API Marketplace Software

What it is

api0.app combines a no-code API builder with a marketplace for publishing and finding APIs. Its visual builder turns tables or defined fields into typed REST endpoints with request validation and pagination. Supported sources include Postgres, MySQL, SQLite, MongoDB, Google Sheets, CSV uploads and existing REST APIs. Each endpoint has an interactive reference and a downloadable OpenAPI 3.1 specification that updates when the schema changes. Generated APIs are private by default, and marketplace publication is optional. Access features include scoped API keys, secret rotation and rate limits that vary by plan. Publishers can charge per request, offer monthly plans or provide a free tier; the platform meters requests, bills buyers and pays builders monthly after a marketplace fee. The dashboard reports request volume, error rate, p95 latency and revenue by endpoint, including customer-level details. The Free plan costs nothing and includes up to 2 live endpoints and 10,000 requests per month.

Spec sheet

Product
api0.app combines a no-code API builder with a marketplace for publishing and finding APIs.Read 30 Sep 2026 · api0.app
Intended users
The site describes use for people building APIs from data, selling existing APIs, shipping MVP backends, wrapping legacy systems, and finding or bundling marketplace APIs.Read 30 Sep 2026 · api0.app
Privacy
Generated APIs default to private, and marketplace publishing is optional for each endpoint.Read 30 Sep 2026 · api0.app
Support
The Free plan lists community support, while Builder lists priority support.Read 30 Sep 2026 · api0.app
Analytics
The dashboard shows requests, error rate, p95 latency, and revenue per endpoint, including per-customer detail.Read 30 Sep 2026 · api0.app
API generation
The visual builder creates typed REST endpoints with request validation and pagination from tables or defined fields.Read 30 Sep 2026 · api0.app
Authentication
The platform supports scoped API keys, secret rotation, and rate limits by plan.Read 30 Sep 2026 · api0.app
Billing
API publishers can set per-call pricing, monthly plans, or a free tier; api0.app meters requests, handles buyer billing, and pays builder earnings monthly after a marketplace fee.Read 30 Sep 2026 · api0.app
Credential security
The site says database credentials are encrypted at rest and are never shared with marketplace buyers.Read 30 Sep 2026 · api0.app
Data sources
The site lists Postgres, MySQL, SQLite, MongoDB, Google Sheets, CSV uploads, and existing REST APIs as supported sources.Read 30 Sep 2026 · api0.app
Documentation
Endpoints include an interactive reference and a downloadable OpenAPI 3.1 specification that updates with schema changes.Read 30 Sep 2026 · api0.app
Enterprise options
The Enterprise plan lists custom volume and SLA, a VPC or on-prem builder option, SSO, and audit logs.Read 30 Sep 2026 · api0.app

Plans and prices

Free Free Free Up to 2 live endpoints · 10,000 requests/month · Community support · Private marketplace listing Read 30 Sep 2026 · api0.app
Builder Price not published Unlimited endpoints · 1M requests/month included · Usage-based billing and payouts · Public marketplace listing · Priority support Read 30 Sep 2026 · api0.app
Enterprise Priced on request Talk to sales Custom volume and SLA · VPC/on-prem builder option · SSO and audit logs · Dedicated marketplace curation Read 30 Sep 2026 · api0.app

Every api0.app plan and price →

Strong points and limits

Strong points

  • Builds typed REST endpoints from multiple data sources.
  • OpenAPI 3.1 specifications update with schema changes.
  • Generated APIs default to private.
  • Publishers can set per-call or monthly pricing.
  • Dashboard includes endpoint and customer-level details.

Limits

  • Free plan allows up to 2 live endpoints.
  • Free plan allows 10,000 requests per month.

Who it suits

It suits people who want to create APIs from data, sell existing APIs, build MVP backends or wrap legacy systems. It also serves people looking to find or bundle APIs through a marketplace.

Verdict

api0.app brings API creation, marketplace publishing and request monetization into one service.

Where Specifiction places it

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